Measurement's report iFi xDSD Default - Reference Audio Analyzer

iFi xDSD

Default
About this report
This is a report for professionals with a suite of test of headphone amplifier.
You can see a simple report for "dummies" with explanations of the main characteristics for iFi xDSD Default

A suite of tests for a headphone amplifier can be applied to just a universal output without a formal presence of an amplifier, if in this mode you can connect headphones to this output. Based on the results of the tests, you can understand the real picture, is the output powerful enough or not, with the initial data on the circuitry as a "black box".

Line-out, differences from the output for headphones and speakers

Advantages and disadvantages of balanced amplifiers

Test report - general data iFi xDSD (as headphone amplifier)

Frequency response, Impedance and Frequency response with standard headphones

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Voltage levels from the load at the output of the amplifier

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Average value of impedance band in 40 Hz - 15 kHz0.1ohm
Voltage:
Linear Mode / Maximum or before clipping level
5.3/10.3dBV
1.8/3.3VRMS
Current:
Linear Mode / Maximum or before clipping level
18.3/43.2dB(mA)
8.3/144.3mA





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Frequency response iFi xDSD Default (as headphone amplifier)

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Channel

Range

Channel:LeftRight
Variation in frequency response in band from 40 Hz - 15 kHz -0.1, +0.0-0.1, +0.0dB



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On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Impedance iFi xDSD Default (as headphone amplifier)

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Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz0.1 0.1ohm
The minimum value in band from 40 Hz - 15 kHz0.1 0.1ohm
The maximum value in band from 40 Hz - 15 kHz0.1 0.1ohm


Comparison of basic characteristics AMPs


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Crosstalk iFi xDSD Default (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -50.5 -50.3dB
Crosstalk @ 1 kHz @ 24.5 ohm -54.1 -53.9dB
Crosstalk @ 1 kHz @ 30.5 ohm -56.2 -56.0dB
Crosstalk @ 1 kHz @ 62.4 ohm -62.7 -62.3dB
Crosstalk @ 1 kHz @ 100.0 ohm -66.8 -66.4dB
Crosstalk @ 1 kHz @ 198.9 ohm -73.3 -73.0dB
Crosstalk @ 1 kHz @ 300.0 ohm -77.1 -76.9dB
Crosstalk @ 1 kHz @ 763.0 ohm -88.7 -86.2dB
Crosstalk @ 1 kHz @ Not loaded-90.8 -90.0dB



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Crosstalk Phase iFi xDSD Default (as headphone amplifier)

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Load




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Frequency response iFi xDSD Default with resistive load

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Range

Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 16 ? + iFi xDSD Default 0.00.0dB
TEST 32 ? + iFi xDSD Default 0.00.0dB
TEST 64 ? + iFi xDSD Default 0.00.0dB
TEST 126 ? + iFi xDSD Default 0.00.0dB
TEST 256 ? + iFi xDSD Default 0.00.0dB
TEST 512 ? + iFi xDSD Default 0.00.0dB



Brief information

Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Frequency response iFi xDSD Default loaded dynamic headphone type

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Range

Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + iFi xDSD Default 0.00.0dB
Grado GH4 Limited Edition + iFi xDSD Default 0.00.0dB



Brief information

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On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Frequency response iFi xDSD Default loaded type balance armature headphone type

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Channel

Range

Frequency response of amplifier loaded type balance armature headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + iFi xDSD Default 0.00.0dB
Campfire Audio Andromeda + iFi xDSD Default 0.30.2dB
Fearless Audio S8F Freedom + iFi xDSD Default 0.20.2dB



Brief information

Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



THD vs load vs output voltage iFi xDSD Default

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Channel

Load

Harmonic, number

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Load

Harmonic, number

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Load


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Maximum voltage output level vs load iFi xDSD Default

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Type of chart

RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A 5.31.818.38.3
Equivalent class AB 9.32.939.897.7
Equivalent class B 10.33.340.3103.5
Maximum mode 10.33.343.2144.3


Volume Control TypeAnalog
Optimal range of volume control36.0dB


Comparison iFi xDSD Default and another amplifiers by loudness (Volume Level)

Main characteristics of the iFi xDSD Default


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Maximum voltage output level vs load iFi xDSD Default

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Maximum Amplifier Voltage Level
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBVVRMSdBVVRMSdBVVRMSdBVVRMS
15.8 ohm -17.80.16.20.16.20.17.20.1
24.5 ohm -11.80.35.20.36.20.36.20.3
30.5 ohm -12.80.28.20.28.20.28.20.2
62.4 ohm -5.80.58.20.59.20.59.20.5
100 ohm -2.70.78.30.79.30.79.30.7
198.9 ohm 4.31.69.31.610.31.610.31.6
300 ohm 5.31.89.31.810.31.810.31.8
763 ohm 5.31.89.31.810.31.810.31.8
Not loaded5.31.89.31.810.31.810.31.8



Maximum level of amplifier current
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dB(mA)mAdB(mA)mAdB(mA)mAdB(mA)mA
15.8 ohm 18.28.142.2128.642.2128.643.2144.2
24.5 ohm 20.410.537.474.438.483.438.483.4
30.5 ohm 17.57.538.584.338.584.338.584.3
62.4 ohm 18.38.332.341.433.346.533.346.5
100 ohm 17.37.328.325.929.329.029.329.0
198.9 ohm 18.38.223.314.624.316.424.316.4
300 ohm 15.76.119.79.720.710.920.710.9
763 ohm 7.62.411.63.812.64.312.64.3


Power
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBmmWdBmmWdBmmWdBmmW
15.8 ohm 0.21.024.2261.124.2261.125.2328.8
24.5 ohm 4.32.721.3135.522.3170.622.3170.6
30.5 ohm 2.41.723.4217.023.4217.023.4217.0
62.4 ohm 6.34.320.3107.121.3134.821.3134.8
100 ohm 7.35.318.367.019.384.319.384.3
198.9 ohm 11.313.416.342.517.353.517.353.5
300 ohm 10.511.214.528.215.535.515.535.5
763 ohm 6.54.410.511.111.514.011.514.0



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Spectrum of Total Harmonic Distortion vs Level iFi xDSD Default (as headphone amplifier)

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Level

Range

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Level

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dBm

Range

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dBV

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Spectrum of Multitone Distortion vs Level vs Load iFi xDSD Default (as headphone amplifier)

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dBm

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Spectrum of IMD SMPTE vs Level iFi xDSD Default (as headphone amplifier)

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Level

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Range

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Level

Range

Range

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Range

dBm

Range

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dBV

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Spectrum of IMD CCIF vs Level iFi xDSD Default (as headphone amplifier)

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Level

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Level

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dBm

Range

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dBV

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More detailed

Measurements of iFi xDSD Default were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The iFi xDSD Default test was conducted as a black box test, without regard to cost and prestige. This is the basic principle for making measurements, measurement reports and developing tests in RAA.

I believe that it is important to do not make an absolute assessment of the device, but an aggregate assessment when working together with a headphones and taking into account external factors. This allows you to effectively reveal the potential of the entire set of devices or to make a more optimal choice of components.




Kuznetsov Roman
Founder of RAA



Known by the nickname romanrex
Аuthor of articles iXBT.com



Information for Authors. You can freely use the graphics in your articles with a link to us.




iFi xDSD is available in reports and services. You are in a professional report.

Information for entry level users

    reports for a newbie (Headphone amplifier)
    The automatic selection of the optimal AMP models









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